`
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title></title>
<meta name="viewport" content="width=device-width,initial-scale=1,minimum-scale=1,maximum-scale=1,user-scalable=no" />
</head>
<body>
<style type="text/css">
#question{
width: 100%;
min-height: 50px;
display: flex;
align-items: stretch;
}
#labels{
width: 20%;
height: 100%;
}
#inp{
width: 80%;
height: 100%;
display: flex;
align-items: stretch;
}
textarea{
width: 100%;
box-sizing: border-box;
overflow: hidden;
resize: none;
}
</style>
<div id="question">
<div id="labels">问题描述</div>
<div id="inp">
<textarea rows="" cols="" placeholder="请输入你的问题" id="autoTextarea"></textarea>
</div>
</div>
<script type="text/javascript">
const textarea = document.getElementById('autoTextarea');
textarea.addEventListener('input', function() {
// 重置高度，使得textarea可以缩小
this.style.height = 'auto';
// 根据内容重新调整高度
this.style.height = this.scrollHeight + 'px';
});
</script>
</body>
</html>